Zellin
From Tardis Wiki, the free Doctor Who reference
Zellin was an immortal being, presumably from before the universe. He appeared as an old man. He kidnapped Tibo one of Ryan Sinclair’s friends. (TV: Can You Hear Me?
Zellin's abilities and species bare a remarkable resemblance to the Vishklar. It's possible that their species are related, as they both originate from different dimensions.